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Finding the Fourth Proportional to 190.17, 286.55 and 156.68

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Solution

The fourth proportional to 190.17, 286.55 and 156.68 is: 236.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.17 : 286.55 = 156.68 : x
  2. Step 2: Convert to fraction form
    190.17/286.55 = 156.68/x
  3. Step 3: Cross multiply
    190.17x = 286.55 × 156.68
  4. Step 4: Simplify right side
    190.17x = 44,896.10
  5. Step 5: Solve for x
    x = 44,896.10/190.17
  6. Step 6: Final answer
    x = 236.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.